Incompatibilties

EconomyShopGui: Shulker quick sell can be used to duplicate items (solution: set sell-shulker-boxes to false in the economyshopgui config.yml)

Any Plugin that modifies shulkers in your inventory. Their actions will be overwritten by axshulkers.

Other shulker viewers (for obvious reasons)

Plugins that have a shulker view might get desynced and show the wrong items (note: if you find something like this and know how to replicate it, we can patch it)